I don't know if you've noticed, but there are some flimsy as heck poster boards out there. If I'm looking to make a large or sturdy project, I need large and sturdy poster board, not a large flimsy sheet of paper.
I don't know the weight of this poster board exactly, but I ALWAYS stock up on these in every color because I will absolutely always get good use out of them.
You can buy them from Hobby Lobby (Click HERE to see on Hobby Lobby website).
Pacon Coated Poster Board - 22"x28"
Each poster board is only .87 cents each, and when on sale, can be found for as low as .25 cents each!!
Check out some of the projects I've used these poster boards on below!